The streetcar strike scrapbooks contain full editions of three Seattle newspapers, The Post-Intelligencer, The Seattle Star, and The Seattle Daily Times from July and August of 1917. The start date of all of the newspapers is July 16, 1917, so it is assumed that they were collected to document the history of the Seattle streetcar strike. In each of these newspapers there are various articles about and photographs of the 1917 strike. Additionally, advertisements created by The Puget Sound Traction, Light and Power Company, which try to portray the striking streetcar employees in a negative light can also be found. Many of these articles, pictures, and advertisements can also be found in the Arthur L. Kempster scrapbooks.